Miten titaanianodeja käytetään laajalti teollisessa galvanointiteollisuudessa?
In the industrial electroplating application industry, the required coating metal is dissolved in the electrolyte, the plated metal substrate is used as the negative electrode, and the anode is used as the positive electrode, forming a complete current transmission cycle. A chemical reaction that occurs simultaneously with electroplating in the electroplating bath is the evolution of oxygen on the anode surface.
Compared with non-inert anodes, the advantage of titanium anodes is that they can maintain a stable distance between the positive and negative electrodes during their service life. Graphite anodes will gradually dissolve during use, causing the distance between electrodes to increase, while inert titanium anodes can ensure stable voltage and product quality.
Due to the catalytic properties of the platinum group elements, the exchange current density on the electrode surface is large and the oxygen precipitation overpotential is low. A special process is used to form a fine-structured oxide film on the titanium surface, which achieves maximum results per unit electrode area. active surface area, so it is particularly suitable for high-speed and high-current density electroplating production.
In addition to titanium anodes and graphite, lead anodes can also be used in this field. However, when lead anodes dissolve, their reactants can negatively impact the environment. These problems can be avoided by using titanium anodes. The working voltage of oxygen-evolving titanium anodes is lower, which can also save energy.
Compared with conventional lead anodes for electroplating, titanium anodes have the following main advantages:
1. The cell voltage is low and the energy consumption is small;
2. The rate of electrode loss is small and the size is stable;
3. The electrode has good corrosion resistance and is insoluble and does not pollute the bath liquid, making the performance of the coating more reliable;
4. The titanium anode adopts new materials and structures, which greatly reduces its weight and facilitates daily operation;
5. Long service life, and the substrate can be reused, saving costs.
